I'm going to put my two cents in here. I know others who have had gas line problems as well. One mechanic said it was lack of additives and suggested using Shell or Chevron due to the additives they have in their gas. I used Shell in my previous boat for 10 years with no problems and I'm using it in my current boat (5yrs) and no problems to date. This mechanic said not use Valero gas, that's what ate up the lines in these other boats. Just my two cents.